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diff --git a/ipv6-tunnel.howto b/ipv6-tunnel.howto new file mode 100644 index 00000000..0b79855b --- /dev/null +++ b/ipv6-tunnel.howto @@ -0,0 +1,100 @@ +4th Mar 2001, Pekka Savola <pekkas@netcore.fi> + + +HOW TO SET UP AN IPV6 TUNNEL +---------------------------- + +ASSUMPTIONS +----------- + +1. You're running Red Hat Linux 7.1 or later. + + This is required for correct IPv6 by default settings, and IPv6 being + enabled as a kernel module by default. You also need recent enough + initscripts, provided in RHL71. + +2. You have a static, globally unique IPv4 address. + +3. Protocol 41 (IPv6) is not being filtered in any firewall. + + +INFORMATION NEEDED +------------------ + +You need to know: + +1. The IPv4 address of your tunnel end point +2. The IPv6 address used in your tunnel + +The other end needs to know the same things about your setup. + +NOTE: It is also possible to set up unnumbered tunnels (no global IPv6 +addresses). + +You must get these from a party (tunnel broker) who's assigning IPv6 tunnels. See: +http://www.bieringer.de/linux/IPv6/IPv6-HOWTO/IPv6-HOWTO-1.html#joinIPv6backbone + +Example from http://www.freenet6.net: +--- +This script will create a tunnel between this computer +and the Freenet6 server (tunnels server) +Your IPv6 address (your tunnel end point) is +3ffe:b00:c18:1fff:0:0:0:7f5 +We establish a tunnel to the Freenet6 server at +3ffe:b00:c18:1fff:0:0:0:7f4 +Your IPv4 address is : 193.xxx.yyy.zzz +The IPv4 address of the Freenet6 server is : 206.123.31.102 +--- + +With this information, a tunnel can be set up: + +SETTING UP THE TUNNEL CONFIGURATION +----------------------------------- + +Now, set up the configuration as follows: + +1. Add 'NETWORKING_IPV6=yes' to /etc/sysconfig/network: + + echo "NETWORKING_IPV6=yes" >> /etc/sysconfig/network + +2. Add static routes to IPv6 Internet: + + echo "sit1 3ffe::/16" >> /etc/sysconfig/static-routes-ipv6 + echo "sit1 2000::/3" >> /etc/sysconfig/static-routes-ipv6 + +3. Create /etc/sysconfig/network-scripts/ifcfg-sit1, with the following: + +--- +DEVICE=sit1 +BOOTPROTO=none +ONBOOT=yes +IPV6INIT=yes +IPV6TUNNELIPV4=206.123.31.102 +IPV6ADDR=3ffe:b00:c18:1fff:0:0:0:7f5/0 +--- + +NOTE: You must use _sit1_. sit0 should not be used. + +NOTE: You must use prefix /0, else you may not be able to ping your P-t-P +peer without tweaking. + +NOTE: If you're not directly connected to the Internet, you may want to use +ONBOOT=no instead. + +TUNNELING +--------- + +Tunnel can be brought up and down with: + + ifup sit1 + ifdown sit1 + +NOTE: Even though sit1 is used, 'ifconfig' sees the tunnel as sit0. This +is due to an "interesting" implementation of tunneling -- else multiple +tunnels couldn't be used extensibly. + +MORE INFORMATION +---------------- + +http://www.bieringer.de/linux/IPv6/IPv6-HOWTO/IPv6-HOWTO.html is a good +source of IPv6 related Linux-information. |